Projecting lamp



Patented Apr. 4, 1922..

3 SHEETS-SHEET I- M. I. SCHAMBERG.

PROJECTING LAMP APPLICATION FILED NOV. 7, 1919. 0o

M. I. SCHAMBERG.

PROJECTING LAMP.

APPLICATION man Nov. 7. 1919.

r w w M Patenwd Apr. 4, 1922.

3 $HEETS-$HEET 3- Jana/1 f) UNITED STATES PATENT OFFICE.

PROJECTING LAMP.

Specification of Letters Patent.

Patented Apr. 4. 1922.

Application filed November 7, 1919. Serial No. 336,248.

To all whom it may concern: I

Be it known that I, MORRIS I. Somurnnno, a citizen of the United States, and resident of New York, in the county of New York and State of New York, have invented'cen tain new and useful Improvements in Projecting Lamps, of which the following is a specification.

My invention relates to improvements in means for concentrating and projecting light from a light source to a desired position, and is particularly useful for surgeons dentists and others requiring a brilliant light in a limited field of operation.

My invention comprises novel details of improvement and combinations of parts that will be more fully hereinafter set forth and then pointed out in the claims.

Reference is had to the accompanying :drawings forming par-thereof wherein Figure 1 is a fragmentary front view of a projecting lamp embodying my invention;

Fig. 2 is a section substantially on the line 22 in Fig. '1;

F ig. 8 is. a face view partly in section on the line 3'3 in Fig. 2; I

Fig. 4. is a fragmentary View taken substantially on the line l-l in Fig. 2;

Figs. 5 and 6 are detail views hereinafter referred to; V v

Fig. 7 is a central section illustratingm improvements comprising means to at Wil vary the direction of the projected rays of light; and

gimilar numerals of reference indicate corresponding'parts in the several views,

' The numeral 1 indicates a frame shown in annular ring-like form adapted to support a plurality of annularly arranged reflectors 2 Which are preferably concave mirror-like reflectors. To said frame a light source, such as an ordinary incandescent lamp socket 3, is adapted to be connected for''supporting a suitable electric lamp am such position that the rays of light from the said lamp will fall upon said annularlydisposed reflectors to be projected therefrom in a desired direction. In the example' illustrated in Figs. 1 to 4 the reflectors 2 are individually supported upon separate finger-like projections 5 suitably positioned and extending from the marginal portion of frame 1 in such a manner that the centers of the mir- 8 is a fragmentary face view or a i may be attached to frame 1 in any desired rors are equidistant from the axis of Said frame. Said frame and its projections may be made from a single piece of sheet metal stamped to desired shape, the marginal edges 5 of the projections 5 being adapted to be folded to retain the corresponding re flector 2, as illustrated in Fig. 2. To pre vent rays of light from lamp t being directly cast in a forward direction and to refleet or direct such rays to the reflectors 2,

-I provide a reflecting shieldi'o located in 'front of lamp it the inner surface of said' extending through holes in said frame and receiving nuts 8 bearing against the opposite sides of frame 1; the outerends of said arms being shown bent laterally at '7 to engage holes 6 in the marginal portion of shield 6. I hiLVGShOWD three of such arms attached to if 'ame 1 although any desired of said arms may be used. I

The reflectors 2 are shown at a position back of light source 4: so as to receive rays number not only direetlyfrom the light source but also indirectly by reflection from said source, sothat the reflector shield'willnot interfere with said direct ra-ys. The arrangement permits all of said rays to converge to afocus point bcyond said shield- The lamp socket 3 I manner. As a simple and inexpensive means for such purpose I provide a ring-like memher 9 shown disposed centrally Within frame '1 and having spaced spring-like fingers 10' Within said ring adapted to receive socket 3 f whereby the latter may be conveniently in. The ring-like member9, as a convenient means of manufacture, may be attached to' frame 1 by'means of a desired number of projections 11 which maybe formed with or secured to said ring and project out Wardly for engagement with projections or arms 12 extending inwardly from frame -1.

Said parts Hand 12 may be secured in any desired manner; I have shown thepart 12 having projections 13 entering apertures 14- in part 11 and the part 11 having a projection 15 entering the aperture 16 in part 12 (Figs. 5 and 6) \vhereb assembled said PIOjGCtlODSIDtlY be folded to retain the parts together. The lamp may be supported in any desired manner as by the "usual flexible conductor 1'7 or by means of any suitable frameor bracket, whereby light from the lamp may be projected upon the desired object.

While in-Figs. 1 and 4 I have illustrated supporting arms 5 for the reflectors 2 as adapted to be bent as desired to cause the raysof light'from saidflrefiectors to be pro- -jected at the: desired angle for concentrating rays from allof the reflectors upon an obis shown in the form of a ring-like wire.

The arms 12 from said ring are provided :with means to sup ort socket 3, shown in the form of springngers-lO secured to arms 12 whereby the socketfor lampAmay be retained centrallydisposed within the. circle I of reflectors 2. s The arms 19 are shown pivotallyrconnected by links 20 with a lamp member 21 that is adjustably supported. lthavepshown member 21 connected with threaded memberl22 by universal joint-23, which threaded member operates in correspondingly threaded member 24 suitably supported, whereby. when member 22 is r0- tated the member 21 will be moved inone or another-direction and the arms 19" will be 1 tiltedand retained in said position for varythe position of the reflectors with respect tollight source eh I have shown the shield fi supported by arms 7 and nuts'8 upon arms 12 in manner before described for retaining theshield in front of the lamp, The parts described with respect to Figs. 7 and 8 are also ishown enclosed within a casing, 25 in 1 ltheinature of headlights for automobiles,

themember 21 being supported in a hearing at 26in said casing, which casm supported in any desired manner.

or lens 27 at the front of the casing 25 may known manner. such as by ring '28. With the arrangement described the angle of the it reflectors 2 with respect tofthe electric light 4-.may be varied as desired so as tocause light projected from the lamp to be cast linrwurdly, from the-automobile at desired points toward or upon the road.

1 Bymeans of my improvements the rays (3r ,light'from the light source 4 will be pro- .1

jecteddirectlyupon, the reflectors 2 as well l as suchrays reflectedon said reflectors from the.reflectorshield (3 which rays will be conhen said parts are may be he glass .pperations on patients and for dentists. be supported thereon in any desired or well solidated and superimposed and will be projected to a desired position in accordance with the distance from the lamp of the object to be illuminated and with respect to the annular relation of the reflectors 2 to the light source at. All of such rays converge to a focal point and by varying the angle of reflectors 2 with respect to the light source the area of light cast from said reflectors upon an object at a given distance may be increased or diminished as desired.

The reflecting minors 2 may be of such] character as to cause light rays from the source of light to be magnified and to magnify the whiteness of the light from the filament or are of the light source whereby abrilliant light may be produced. By means of my invention the reflectors receive the light directly from the lamp filament in such a manner as reflect such light forward upon a given spaceto increase the intensity of the light thereon. This result is effected by reason of the series of spaced concave reflectors located behind the light source andfin position to project the rays forward around the light and its shield to a givenosition. The image of the lamp filament wit its full li; ht

intensity is received by the reflectors .an is projected, therefrom forward to the focal point, a series of bright images of the intense light of the filament being outlinedyand by' 7 using thelight on an object at a determined distance from the light source superimposed rays from the reflectors give a brilliant and- .intense white light on, the object without the glare that would be produced by the directraysfrom the light source. By reason of the annular arran ement of the reflectors the light is projected orward upon an object 1 to be illuminated ina manner to minimize shadows, as, fol-instance, 1f the hand or ,fingers of. an operator be-interposed in a portion of the light cast upon anohjsetthe remainder of the light will be so strongas to maintain a satisfactory illumination of the object. My projecting lamp is particularly useful for projecting brilliant, strong light-directly upon an object, such. as in the mouth-or other cavities of a patient, or upon desired parts of their bodies, for use of surgeons for their y improvements, also, may be used in other relations, such as for reading lamps, for head vided,js'ince all of the reflectors 2 are ar ranged about a centrallight source receiving rays of lighttherefrom in an equal manner directly as well as receiving reflected rays from the reflecting shield 6, which is within all thelight rays projected from the reflectors. Since the light rays are pro jected from the reflectors 2 angularly disposed regarding the light source, said rays may be concentrated within a certain area, and may be cast into the mouth of a patient without being cast into the patients eyes, the shield 6 obstructing the direct rays from the light source into the patients eyes.

My invention is not limited to the details of construction herein set forth, since the same may be varied, within the scope of the appended claims, without departing from the spirit of my invention.

A feature of particular importance in my invention is that the reflecting means is arranged substantially in the form of an annulus back of the light source without any reflecting medium within-such annulus, whereby rays from the angularly disposed reflecting annulus may be concentrated on objects without'direct parallel rays from the light source being reflected from within the annulus upon the same object. \Vith the shield in front of the light source and no reflector behind the light source in a direct line from the object through the light source the advantage of preventing the rays from reaching the patientseyes is attained.

Having thus described my invention, what I claim and desire to secure by Letters Patent is:

1. A, projecting lamp comprising a frame having means to support a light source and having means outside of said light source to support a plurality of annularly dis posed reflectors, arms extending from said frame forwardly outside of said light source,

and a reflecting shield carried by'said arms in front of said light source to reflect rays therefrom to the first named reflectors.

2. A projecting lamp comprising a frame having means'to support a light source and having means to support a light source and to support a plurality of annularly disposed refiectors, a reflecting shield for the iight'source, and means to detachably connect said shield with said frame whereby the shield is supported in front of said light source to reflect rays therefrom to the first named reflectors.

3. A projecting lamp comprising a frame having centrally disposed fingers to receive a lamp socket therebetween and having outwardly disposed arms outside of said fingers, and reflectors secured upon said arms for receiving rays from a light source carried by said socket.

4. A projecting lamp comprising a ringlike frame having inwardly disposed pro jections and outwardly disposed arms, a ring having outwardly disposed projections attached to the first named projections, said ring having inner spaced spring'like fingers to receive a lamp socket, and reflectors secured to said arms to receive rays from a light source connected to said socket.

Signed at New York, in the county of New York and State of New York this 5th day of November, A. D. 1919.

MORRIS I. 'SCHAMBERG. 

